<!DOCTYPE HTML>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>判断语句</title>
    <script type="text/javascript">
        var score =80; //score变量存储成绩，初值为80
        if(score > 60)
        {
            document.write("很棒，成绩及格了。");
        }
        else
        {
            document.write("加油，成绩不及格。");
        }
    </script>
</head>
<body>
</body>
</html>